Toronto police Detective Sgt. Hank Idsinga said Monday the 66-year-old landscaper has been charged with first-degree murder in the death of Kirushna Kumar Kanagaratnam.
Human remains belonging to at least seven victims had been found in planters at a Toronto home linked to McArthur's work as a landscaper.
He added that the photos police released in March and earlier in April helped them identify this victim.
Toronto police believe that Kanagaratnam was killed sometime between Sept 3 and Dec 14 2015. Kangaratnam, whose only family in Canada appears to be a few distant cousins, appears to be the latest to follow the pattern.
The homicide detective said Kanagaratnam was identified with the help of an global government agency but refused to provide more details.
Idsinga said Kanagaratnam had never been reported missing to local authorities in Canada.
The detective did not reveal Kanagaratnam's immigration status and said he had never been reported missing in Canada. Idsinga said there is also no indication that Kanagaratnam was active on an online dating website.
On Friday, police announced they had identified the man but did not immediately release his name as next of kin were being notified.
Last week, McArthur was charged in the death of 42-year-old Abdulbasir Faizi, who disappeared from the gay village in 2010. A statement from the Toronto Police Department said the remains of Kayhan have not been identified.
"The stress and anxiety over dealing with hundreds of tips, hundreds of missing person occurrences and dozens of potential identifications for the eighth victim has been enormous", Idsinga said.
McArthur, of Thornbcliffe Park, was arrested in January and charged with the murders of Andrew Kinsman and Selim Esen, who went missing from the Church St. village in 2017. It's unknown whether he will be facing further charges, but investigators are looking into murders and disappearances going back as far as 1975.
Idsinga did not rule out the possibility that Kayhan's body could be found with the remains that have already been discovered.